Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca639f8be5fc164…

MALICIOUS

PDF

101.5 KB Created: 2021-03-31 01:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a792bbfe22eee56c42881a02e7c9d837 SHA-1: f0b0030b54fb18a8b8ce73f14ffc49cb9037c371 SHA-256: 2ca639f8be5fc164cf7b26bd179846998b704528b790a744f7756f127f2fb549
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a phishing domain, identified by both heuristics and a machine learning classifier. The ClamAV detection further confirms its malicious nature. The document body, though obfuscated, suggests a lure related to an 'acknowledgement slip', likely intended to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/award?keyword=acknowledgement+slip+pdf
    • https://sejesomizibiji.weebly.com/uploads/1/3/5/3/135346687/2349ee8.pdf
    • http://form-copyrightservices.com/how_to_train_for_a_half_marathon_beginners_6_monthsf7jgc.pdf
    • http://sandwichhq.club/advanced_language_practise_vincewqiwv.pdf
    • http://shoop-fg.ru/uniformly_accelerated_motion_vertical_dimension_lesson_planxssxn.pdf
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/8426833.pdf
    • http://creditreportus.info/70999158218az3ka.pdf
    • http://gazzsheff.xyz/bike_computer_your_personal_gps_cycling_trackerw0vu7.pdf
    • http://blekrossi.ru/anarchist_cookbook_movie_netflix946mm.pdf
    • http://elerctum.org/2000_polaris_sportsman_400_4x4_parts1nvi7.pdf
    • http://kulokozataxat.22web.org/cahier_francais.pdf
    • http://yeswins.space/39642549328vssdd.pdf
    • https://rukudigef.weebly.com/uploads/1/3/4/6/134642400/2269658.pdf
    • http://webdefilmizle.com/panasonic_home_phone_with_headset_jack4qdui.pdf
    • http://my-credit.info/sawalukiviz62u26.pdf
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/9007343.pdf
    • http://de-bewertung-id2842384.icu/64428548943u52nt.pdf
    • https://zatofurepodato.weebly.com/uploads/1/3/1/4/131482853/vadimepoj.pdf
    • http://ihsteam.ru/44629439231v8bn6.pdf
    • http://com-servers.online/how_to_do_model_summary_in_spssy5k03.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://renirujetumofid.epizy.com/what_statement_is_true_about_iteration_planning.pdf
    • http://vufagozujidivu.epizy.com/kisupefudufarubalogaje.pdf
    • http://wavitur.rf.gd/dawediluv.pdf
    • http://poxipepeti.epizy.com/can_you_use_nuna_pipa_with_uppababy_vista.pdf
    • http://sexililelaweru.rf.gd/kielbasa_potatoes_and_peppers_sheet_pan.pdf
    • http://ropisobe.epizy.com/easy_classical_piano_pieces_for_beginners.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000102f7.bin
60e816a28047c6e25727f6db2e7dd28a8f4037cdd1dd13cd60e468031d268cf1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x102F7 3488 bytes
font_00_sfnt_off0000de99.bin
e469a4b6351ee09e4f7d827cdb24be535f4a325fb7957108893b1bba4395fefc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE99 5328 bytes
font_01_sfnt_off0000f19a.bin
93f722a56cddc75658c697aa2c518f45b82aadba21d3b7a255c0523e701cfcae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 5104 bytes
font_03_sfnt_off00011060.bin
0a092aaf7a81b12efd2446d054491c42d3a6181602bf4a4460cf7d20c9626dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11060 5024 bytes
font_04_sfnt_off00012058.bin
e1533460801c9fd7e82bd0f60e7af2b8f0cd144e7680dd042db1a6e17fae8655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12058 15920 bytes
font_05_sfnt_off000150e2.bin
567041da038f8646e7edb2bf3102370ca86167a9e3910f303515d78165107ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150E2 17052 bytes
font_06_sfnt_off00016950.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16950 4324 bytes
font_07_sfnt_off00017750.bin
c371da3d4efff0f9d27cb17ba5b97f623fa5c7f2c009f26838cbc086e35776af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17750 3408 bytes

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